Institute of Natural and Environmental Sciences, University of Hyogo, Sanda, Japan.
Division of Nature and Environmental Management, Museum of Nature and Human Activities, Sanda, Japan.
J Fish Biol. 2020 Jun;96(6):1538-1542. doi: 10.1111/jfb.14350. Epub 2020 May 4.
The cuckoo catfish Synodontis multipunctatus and S. grandiops are endemic to Lake Tanganyika and the only known nonavian vertebrates that exhibit obligate interspecific brood parasitism. Seven maternal mouth-brooding cichlid fish species are reported to be natural hosts of the parasitic catfish and share a common reproductive behaviour that the catfish exploits: cichlid females spawn eggs on the bottom, allowing the catfish female to place her eggs near the cichlid eggs, and the cichlid females collect the catfish eggs by mouth together with their own eggs. However, so far it has not been reported that the cuckoo catfish exploit different spawning behaviours. The genus Cyprichromis consists of five maternal mouth-brooding species endemic to Lake Tanganyika, most of which spawn and collect eggs in open water. This study reports that the cuckoo catfish also parasitizes the open-water spawning Cyprichromis coloratus, although it may not be a regular host.
冈氏非洲肺鱼 Synodontis multipunctatus 和 S. grandiops 是仅分布于坦噶尼喀湖的特有种，也是已知的唯一表现出强制性种间卵寄生的非鸟类脊椎动物。有七种口孵护卵慈鲷鱼被报道为寄生鲶鱼的天然宿主，它们具有一种共同的被鲶鱼利用的生殖行为：慈鲷鱼雌性将卵产在底部，允许鲶鱼雌性将其卵产在靠近慈鲷鱼卵的地方，然后慈鲷鱼雌性将鲶鱼卵与其自己的卵一起用嘴收集。然而，到目前为止，还没有报道称鲶鱼会利用不同的产卵行为。Cyprichromis 属由五种分布于坦噶尼喀湖的母性口孵护卵物种组成，它们中的大多数在开阔水域产卵和收集卵。本研究报告称，这种寄生鲶鱼也会寄生在开阔水域产卵的 Cyprichromis coloratus 上，尽管它可能不是一种常规宿主。
